I really can't recall why I open up this particular port. Would appreciate if someone can explain what is a bvcontrol and what a remote config server does? So that I can figure out whether to keep this port open or close.

bv-Control for UNIX v9.0 is a security and systems management tool for
system administrators and security auditors. The tool’s implementation
adopts the powerful querying and reporting features of RMS Console and
Information Server. The RMS Console along with bv-Control for UNIX is
a powerful tool designed to help you manage your server environment.
For more information about the RMS Console and the Information Server
see the RMS Console and Information Server Getting Started Guide.

Since this is a commercial software product, you would probably know if you were using it. As for the "Gracilis Packeten remote config server", here's a clue for you: